XGY   Grimsby Mountain, ON Weather Observed At   43-11  N    79-34  W

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2026-08-15	2:45pm			Max		Min
Weather		----
Temperature		24.1 °C		24.6 °C	2:13pm	17.9 °C	7:19am
Relative Humidity		78 %		89 %	7:05am	63 %	11:16am
Dew Point		20.0 °C		20.6 °C	1:04pm	15.6 °C	3:25am
Wind Velocity		22 ° at  4.7 G 12.2 kt		20.9 kt	11:28am
Pressure		30.206 "  ↓		30.229 "	12:45pm	30.144 "	5:52am
Rainfall Rate		0.0 mm/h		0.0 mm/h	----m
Snow On Ground		0 cm
Brightness / Darkness		798 W/m² /  0.00 m/"²		1123 W/m²	1:03pm	20.14 m/"²	3:13am
Remarks

Rainfall	Today	0.0 mm	Storm Total	0.0 mm
Snowfall	Today	0.0 cm	Storm Total	0.0 cm

Evapotranspiration

Today

-2.44 mm

Lake Conditions

Water Temperature  22.2 °C

Waves  4 '

ICE FREE

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Meteor Index	93   Perseids
Aurora Index / Solar	9   Quiet   + 3 nT	Solar Flux   114  sfu  /   S 0    G 0    R 0   /  MUF   23.3 MHz

Sunrise	6:24am	Sunset	8:21pm
Moonrise	N/A	Moonset	N/A	Moon Phase	Waxing Crescent

Grimsby Mountain Weather Maps
Local	Regional	Area	Synoptic
updated H+09 and every 10m	updated H+19 and H+49	updated H+19

Ontario 6-Hour Meteorological Summary

Canadian 6-Hour Meteorological Summaries

CLIMAT Data
Official	Yesterday					2004	2005	2006	2007	2008	2009	Normals & Records
		2010	2011	2012	2013	2014	2015	2016	2017	2018	2019
		2020	2021	2022	2023	2024	2025	2026

Grimsby Mountain Charts

	Sky Quality (Darkness) Meter courtesy of

              

Wx Map	Sat Pix	IR Sat Pix	Radar	Lightning
	Water	Ice

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  This is a privately operated weather station that is part of the Meteorological Service of Canada's official observing network.
Permission to publish the weather statistics found on this website is not required.
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